Integral single-frame two-way headrest with U-shaped single rod

ABSTRACT

Provided is an integral single-frame two-way headrest with a U-shaped single rod, comprising a U-shaped rod, an integral frame and a cover, the integral frame being externally covered with the cove, and the integral frame is hollow inside. An opening is arranged at a lower end of the integral frame, and an upper portion of the U-shaped rod is inserted into the inner frame from the opening, a plurality of positioning grooves is arranged on the right side of two downwardly extending ends of the U-shaped rod. A rod guide sleeve sleeved on both ends of the U-shaped rod is mounted at both ends of the opening, and the outer side of the integral frame is mounted with an unlocking steel wire corresponding to the positioning groove at both ends of the U-shaped rod, an unlocking lever connected with the unlocking steel wire and laterally movable is mounted in a hollow portion of the integral frame. The present invention has the characteristics of simple structure, convenient assembly and greatly reduced production cost.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of international PCT applicationserial no. PCT/CN2017/100341, filed on Sep. 4, 2017, which claims thepriority benefit of China application no. 201710473997.6, filed on Jun.21, 2017. The entirety of each of the above-mentioned patentapplications is hereby incorporated by reference herein and made a partof this specification.

BACKGROUND Technical Field

The present invention relates to the technical field of automobileheadrests, in particular to an integral single-frame two-way headrestwith a U-shaped single rod.

Description of Related Art

A conventional simple type of a two-way headrest is usually assembled intwo structures. One structure uses a combined headrest frame and aU-shaped single rod. When installing, the U-shaped single rod is firstinstalled in a splicing piece of the headrest frame, and then the entireproduct is assembled. As disclosed in Patent Publication No.CN201510282566, the assembling method is mainly used to produce aheadrest with this structure. This kind of production reduces thestrength of the headrest frame itself and also make it difficult toassemble the headrest, which increases labor costs. The second structureis mentioned in Patent Publication No. CN201310451754. The structureuses two separate rods. When installing, the two separate rods are firstinstalled in the headrest frame, and then the two rods are connected bywelding to finish the assembly process. Such method greatly affects thestrength of the headrest and is inconvenient for the workers toperforming assembling. In order to solve the defects of the above twokinds of two-way headrests while improving the production efficiency ofthe headrest and reducing the cost of the headrest, it is very necessaryto design a new two-way headrest.

SUMMARY

The technical problem to be solved by the present invention is toprovide an integral single-frame two-way headrest with a U-shaped singlerod. By designing an integral headrest frame with a hollow lower portionand a central portion and a U-shaped single rod, the assembly of thetwo-way headrest is facilitated, the strength of the headrest isincreased, the cost of the headrest is reduced, and the labor cost inthe production process is reduced.

The technical solution used by the present invention to solve thetechnical problem thereof is to provide an integral single-frame two-wayheadrest with a U-shaped single rod, comprising a U-shaped rod, anintegral frame and a cover, the integral frame being externally coveredwith the cover, the integral frame is hollow inside, an opening isarranged at a lower end of the integral frame, and an upper portion ofthe U-shaped rod is inserted into the inner frame from the opening, aplurality of positioning grooves is arranged on the right side of twodownwardly extending ends of the U-shaped rod, a rod guide sleevesleeved on both ends of the U-shaped rod is mounted at both ends of theopening, and the outer side of the integral frame is mounted with anunlocking steel wire corresponding to the positioning groove at bothends of the U-shaped rod, an unlocking lever connected with theunlocking steel wire and laterally movable is mounted in a hollowportion of the integral frame.

A rod limit bracket is arranged above the rod guide sleeve, the rodlimit bracket is fastened in the integral frame, and a connecting holematching with the U-shaped rod is arranged in the middle portionthereof, a positioning extension is disposed on a side of the rod limitbracket near the middle of the integral frame, a positioning post isvertically disposed on the positioning extension, and the positioningpost is pressed against the middle of the U-shaped rod when the U-shapedrod is moved downward.

A deformable inner wall is arranged at a lower portion of the rear sidewall of the connecting hole, a leakage groove is disposed inside thedeformable inner wall, and the deformable inner wall is provided withmounting grooves at both ends thereof, and a metal elastic sheet thatpasses through the leakage groove is installed between two mountinggrooves.

A lower outer ring of the rod guide sleeve is provided with a fasteningprotrusion that matches with both sides of the opening of the integralframe, a positioning through hole is arranged in a middle portion of therod guide sleeve, an arc-shaped groove is formed under an inner wall ofthe rear side of the positioning through hole, and the metal elasticsheet is mounted in the arc-shaped groove, a front portion of the rodguide sleeve is provided with a protective extension extending upwardlyand covering the mounting position of the unlocking steel wire, and aninner groove matching with the unlocking steel wire is provided on arear side of the protective extension.

A central portion of the hollow portion of the integral frame isarranged with a protruding positioning plate at a lower end near theupper side of the unlocking lever, a spring mounting portion is disposedon the upper side of the unlocking lever at a position on the left sideof the protruding positioning plate, and a positioning protrusion isdisposed at a position on the upper side of the unlocking lever at theright side of the protruding positioning plate, a lower portion of theleft side of the protruding positioning plate is arranged with aprotruding column, and a return spring is installed between theprotruding column and the spring mounting portion.

The positioning protrusion is higher than the lower end of theprotruding positioning plate, and a side of the positioning protrusionnear the protruding positioning plate has a vertical wall structure.

Unlocking grooves corresponding to each of two unlocking steel wiresrespectively are arranged on a lower side of the unlocking lever.

A button seat is mounted on a lower left side of the integral frame at aposition near the left end of the unlocking lever, and an unlockingbutton abutting against the left end of the unlocking lever is mountedin the button seat.

The left end of the unlocking lever is bent downward to form a contactend.

A steel wire fixing protrusion is disposed at a position of the frontside of the integral frame where the unlocking steel wire is mounted,and the steel wire fixing protrusion has a semicircular convexstructure, the right side of the steel wire fixing protrusion extendsupward to form a steel wire positioning extension matching with thevertical portion of the unlocking steel wire, a steel wire positioninggroove is disposed at an upper end of the steel wire positioningextension, a lower end of the unlocking steel wire is wound around theouter ring of the steel wire fixing protrusion, and an upper end of theunlocking steel wire is engaged with the steel wire positioning groove.

Technical Effects:

The present invention relates to an integral single-frame two-wayheadrest using a U-shaped single rod, which has a compact structure andhas the following advantages: (1) by using a U-shaped rod as a headrestrod, the strength of the headrest rod is improved to avoid deformationwhen the headrest rod is used; (2) meanwhile, an integrally formedplastic part is designed as the integral frame which eliminates thetechnical bias that the conventional U-shaped rod must use a split typeframe, greatly improving the strength of the headrest and reducing thematerial consumption and the cost; (3) while designing the integralframe, the structure of the rod guide sleeve and the rod limit bracketis improved, so that it can be first installed on the U-shaped rod, andthe U-shaped rods are inserted into the lower portion of the integralframe and are buckled and positioned with the frame, which greatlyfacilitates the assembly of the headrest and improves the productionefficiency of the product; (4) by arranging the steel wire fixingprotrusion on the integral frame, which is convenient for the unlock ofthe steel wire and prevents the unlocking steel wire from being deformedduring work.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural view of the present invention;

FIG. 2 is a front view of the integral frame according to the presentinvention;

FIG. 3 is a bottom view of the integral frame according to the presentinvention;

FIG. 4 is an enlarged view of portion A in FIG. 2 according to thepresent invention;

FIG. 5 is a structural view of the unlocking lever according to thepresent invention;

FIG. 6 is an assembled view of a rod limit bracket and a rod guidesleeve according to the present invention;

FIG. 7 is a structural view of a positioning groove according to thepresent invention;

FIG. 8 is a structural view of the rod limit bracket according to thepresent invention;

FIG. 9 is a bottom view of the rod limit bracket according to thepresent invention;

FIG. 10 is a structural view of the rod guide sleeve according to thepresent invention;

FIG. 11 is a bottom view of the rod guide sleeve according to thepresent invention.

FIG. 12 is a partial view of a portion connecting an unlocking lever, aprotruding positioning plate and a protruding column according to thepresent invention.

Reference signs: 1, cover; 2, U-shaped rod; 3, integral frame; 4,opening; 5, button seat; 6, unlocking button; 7, rod guide sleeve; 8,rod limit bracket; 9, unlocking lever; 10, return spring; 11, contactend; 12, spring mounting portion; 13, unlocking groove; 14, steel wirefixing protrusion; 15, steel wire positioning groove; 16, unlockingsteel wire; 17, positioning groove; 18, positioning extension; 19,positioning post; 20, arc-shaped positioning groove; 21, connectinghole; 22, deformable inner wall; 23, mounting groove; 24, metal elasticsheet; 25, protective extension; 26, inner groove; 27, arc-shapedgroove; 28, positioning through hole; 29, protruding positioning plate;30, protruding column; 31, positioning protrusion.

DESCRIPTION OF THE EMBODIMENTS

The present invention is further described below in combination withspecific examples. It should be understood that these examples are onlyfor illustrating the present invention and are not intended to limit thescope of the present invention. In addition, it should be understoodthat after reading the teachings of the present invention, those skilledin the art can make various changes or modifications to the presentinvention, and these equivalent forms also fall within the scope definedby the appended claims of the present application.

An embodiment of the present invention relates to an integralsingle-frame two-way headrest using a U-shaped single rod, as shown inFIGS. 1-12, including a U-shaped rod 2, an integral frame 3, and a cover1. The integral frame 3 is externally covered with a cover 1, and theintegral frame 3 is hollow inside. An opening 4 is arranged at a lowerend of the integral frame 3, and an upper portion of the U-shaped rod 2is inserted from the opening 4 into the interior of the integral frame3. A row of positioning grooves 17 are disposed on the right side of twodownwardly extending ends of the U-shaped rod 2. A rod guide sleeve 7sleeved on both ends of the U-shaped rod 2 is mounted at both ends ofthe opening 4. The outer side of the integral frame 3 is mounted with anunlocking steel wire 16 corresponding to the positioning groove 17 atboth ends of the U-shaped rod 2, and an unlocking lever 9 connected withthe unlocking steel wire 16 and laterally movable is mounted in a hollowportion of the integral frame 3.

A rod limit bracket 8 is mounted above the rod guide sleeve 7. The rodlimit bracket 8 is fastened in the integral frame 3, and a connectinghole 21 matching with the U-shaped rod 2 is arranged in the middleportion thereof. A positioning extension 18 is disposed on a side of therod limit bracket 8 near the middle of the integral frame 3. Apositioning post 19 is vertically disposed on the positioning extension18, and the positioning post 19 is pressed against the middle of theU-shaped rod 2 when the U-shaped rod 2 is moved downward.

A deformable inner wall 22 is arranged at a lower portion of the rearside wall of the connecting hole 21, and a leakage groove is disposedinside the deformable inner wall 22. The deformable inner wall 22 isprovided with a mounting groove 23 at both ends thereof, and a metalelastic sheet 24 that passes through the leakage groove is installedbetween two mounting grooves 23.

The lower outer ring of the rod guide sleeve 7 is provided with afastening protrusion that matches with both sides of the opening 4 ofthe integral frame 3, and a positioning guide through hole 28 isarranged in a middle portion of the rod guide sleeve 7. An arc-shapedgroove 27 is formed under an inner wall of the rear side of thepositioning through hole 28, and the metal elastic sheet 24 is mountedin the arc-shaped groove 27. The front portion of the rod guide sleeve 7is provided with a protective extension 25 extending upwardly andcovering the mounting position of the unlocking steel wire 16, and aninner groove 26 is provided on the rear side of the protective extension25 to match with the unlocking steel wire 16.

A central portion of the hollow portion of the integral frame 3 isdisposed with a protruding positioning plate 29 at a lower end near theupper side of the unlocking lever 9. A spring mounting portion 12 isdisposed on the upper side of the unlocking lever 9 at a position on theleft side of the protruding positioning plate 29, and a positioningprotrusion 31 is disposed at a position on the upper side of theunlocking lever 9 at the right side of the protruding positioning plate29. The lower portion of the left side of the protruding positioningplate 29 is arranged with a protruding column 30, and a return spring 10is installed between the protruding column 30 and the spring mountingportion 12.

The positioning protrusion 31 is higher than the lower end of theprotruding positioning plate 29, and a side of the positioningprotrusion 31 near the protruding positioning plate 29 has a verticalwall structure.

Unlocking grooves 13 corresponding to each of two unlocking steel wires16 respectively are arranged on the lower side of the unlocking lever 9.

A button seat 5 is mounted on a lower left side of the integral frame 3at a position near the left end of the unlocking lever 9, and anunlocking button 6 abutting against the left end of the unlocking lever9 is mounted in the button seat 5.

The left end of the unlocking lever 9 is bent downward to form a contactend 11.

A steel wire fixing protrusion 14 is disposed at a position of the frontside of the integral frame 3 where the unlocking steel wire 16 ismounted, and the steel wire fixing protrusion 14 has a semicircularconvex structure. The right side of the steel wire fixing protrusion 14extends upward to form a steel wire positioning extension matching withthe vertical portion of the unlocking steel wire 16. A steel wirepositioning groove 15 is disposed at an upper end of the steel wirepositioning extension. The lower end of the unlocking steel wire 16 iswound around the outer ring of the steel wire fixing protrusion 14, andthe upper end of the unlocking steel wire 16 is engaged with the steelwire positioning groove 15.

EXAMPLES

When assembling, the unlocking lever 9 is first installed laterally inthe hollow interior of the integral frame 3, while a return spring 10 ismounted inside the spring mounting portion 12 of the unlocking lever 9,and the projecting end of the return spring 10 is sleeved on thepositioning projection 31 on the protruding positioning plate 29 insidethe integral frame 3, the button seat 5 and the unlocking button 6 arethen mounted on the integral frame 3. One end of the unlocking button 6is in contact with the contact end 11 of the unlocking lever 9. Afterthis, the U-shaped rod 2 with the rod limit brackets 8 is fitted fromthe lower opening 4 of the integral frame 3 into the integral frame,then a support rod limit bracket 8 is sleeved on both ends of a U-shapedrod 2, and the positioning posts 19 of the two rod limit brackets 8 arelocated below the middle of the U-shaped rod 2, and an arc-shapedpositioning groove 20 is arranged in the frame 3 at the upper end of thepositioning post 19. Then, two unlocking steel wires 16 are mounted onthe steel wire fixing protrusions 14, the upper end of the unlockingsteel wire 16 passes through the positioning groove 17 on the U-shapedrod 2 and the unlocking groove 13 on the unlocking lever 9 in order.Finally, the two rod guide sleeves 7 are loaded from both ends of theU-shaped rod 2, and the rod guide sleeves 7 are fastened in both ends ofthe lower opening 4 of the integral frame 3. The integral frame 3 isdesigned in an integrated structure, and the interior of the frame ishollow, which can effectively save the amount of raw materials forproducts without reducing the structural strength, thereby reducingcost. When the conventional two-way headrest is installed, it is usuallynecessary to select a double-rod structure. When assembling, the doublerod structure is usually assembled by tooling, which greatly increasesproduction cost and cannot guarantee production efficiency.

Since the lower part of the U-shaped rod 2 is bent at a certain angle,in order to facilitate the installation of the rod guide sleeve 7 andthe rod limit bracket 8, a special structure is designed for the rodguide sleeve 7 and the rod limit bracket 8. The lower end of the guidesleeve 7 is designed with an arc-shaped groove 27, so that thepositioning through hole 28 of the rod guide sleeve 7 has a certaindeformation, which facilitates the assembly of the U-shaped rod 2 andthe rod guide sleeve 7. Meanwhile, in order to prevent the positioningthrough hole 28 from being damaged due to excessive deformation, a metalelastic sheet 24 is mounted in the arc-shaped groove 27, and a metalelastic sheet 24 is also mounted in the rod limit bracket 8. Differentfrom that of the rod guide sleeve 7, the metal elastic sheet 24 iscompletely inserted into the rod limit bracket 8 through the injectionmolding machine. With this structure, it is mainly considered that therod limit bracket 8 is located above the rod guide sleeve 7, which isconnected with the integral frame 3 by means of a buckle type structure.In order to make the structure more stable, the structural rigidity ofthe external snap portion needs to be strengthened, so the connectinghole 21 requires a larger deformation. While ensuring that the externalstructure of the rod limit bracket 8 is not affected, it can only beused by way of a larger leakage groove arranged in the interior of therod limit bracket 8. Since a larger leakage groove may create a hiddendanger that the metal elastic sheet 24 cannot be fixed, the metalelastic sheet 24 is embedded into the rod limit bracket 8.

What is claimed is:
 1. An integral single-frame two-way headrest with aU-shaped single rod, comprising a U-shaped rod, an integral frame and acover, wherein the integral frame is externally covered with the cover,the integral frame is hollow inside, an opening is arranged at a lowerend of the integral frame, and an upper portion of the U-shaped rod isinserted into the inner frame from the opening, a plurality ofpositioning grooves is arranged on right side of one of two downwardlyextending ends of the U-shaped rod, a rod guide sleeve sleeved on bothends of the U-shaped rod is mounted at both ends of the opening, anouter side of the integral frame is mounted with an unlocking steel wirecorresponding to the positioning grooves, an unlocking lever connectedwith the unlocking steel wire and being laterally movable is mounted ina hollow portion of the integral frame, a button seat is mounted on alower left side of the integral frame at a position near a left end ofthe unlocking lever, an unlocking button abutting against the left endof the unlocking lever is mounted in the button seat, the left end ofthe unlocking lever is bent downward to form a contact end, a steel wirefixing protrusion is disposed at a position of a front side of theintegral frame where the unlocking steel wire is mounted, the steel wirefixing protrusion has a semicircular convex structure, a right side ofthe steel wire fixing protrusion extends upward to form a steel wirepositioning extension matching with a vertical portion of the unlockingsteel wire, a steel wire positioning groove is disposed at an upper endof the steel wire positioning extension, a lower end of the unlockingsteel wire is wound around an outer ring of the steel wire fixingprotrusion, and an upper end of the unlocking steel wire is engaged withthe steel wire positioning groove.
 2. The integral single-frame two-wayheadrest with a U-shaped single rod according to claim 1, wherein a rodlimit bracket is arranged above the rod guide sleeve, the rod limitbracket is fastened in the integral frame, the rod limit bracket has aconnecting hole matching with the U-shaped rod, a middle portion of theU-shaped rod is configured to be arranged in the connecting hole, apositioning extension is disposed on a side of the rod limit bracket ina middle portion of the integral frame, a positioning post is verticallydisposed on the positioning extension, and the positioning post ispressed against a middle portion of the U-shaped rod when the U-shapedrod is moved downward.
 3. The integral single-frame two-way headrestwith a U-shaped single rod according to claim 2, wherein a deformableinner wall is arranged at a lower portion of a rear side wall of theconnecting hole, a leakage groove is disposed inside the deformableinner wall, the deformable inner wall is provided with mounting groovesat both ends of the deformable inner wall, and a metal elastic sheetthat passes through the leakage groove is installed between the mountinggrooves.
 4. The integral single-frame two-way headrest with a U-shapedsingle rod according to claim 1, wherein a lower outer ring of the rodguide sleeve is provided with a fastening protrusion that matches withboth sides of the opening of the integral frame, a positioning throughhole is arranged in a middle portion of the rod guide sleeve, anarc-shaped groove is formed under an inner wall of a rear side of thepositioning through hole, a metal elastic sheet is mounted in thearc-shaped groove, a front portion of the rod guide sleeve is providedwith a protective extension extending upwardly and covering a mountingposition of the unlocking steel wire, and an inner groove matching withthe unlocking steel wire is provided on a rear side of the protectiveextension.
 5. The integral single-frame two-way headrest with a U-shapedsingle rod according to claim 1, wherein a central portion of the hollowportion of the integral frame is arranged with a protruding positioningplate at a lower end near an upper side of the unlocking lever, a springmounting portion is disposed on the upper side of the unlocking lever ata position on a left side of the protruding positioning plate, apositioning protrusion is disposed at a position on the upper side ofthe unlocking lever at a right side of the protruding positioning plate,a lower portion of the left side of the protruding positioning plate isarranged with a protruding column, and a return spring is installedbetween the protruding column and the spring mounting portion.
 6. Theintegral single-frame two-way headrest with a U-shaped single rodaccording to claim 5, wherein the positioning protrusion is higher thanlower end of the protruding positioning plate, and a side of thepositioning protrusion near the protruding positioning plate has avertical wall structure.
 7. The integral single-frame two-way headrestwith a U-shaped single rod according to claim 1, wherein unlockinggrooves corresponding to each of two unlocking steel wires respectivelyare arranged on a lower side of the unlocking lever.